package com.woniu.service.impl;

import com.woniu.api.RemoteProductServe;
import com.woniu.service.OrderService;
import com.woniu.dao.OrderDao;
import com.woniu.entity.Order;
import com.woniu.entity.Product;
import com.woniu.entity.utils.ResponseEntity;
import io.seata.spring.annotation.GlobalTransactional;
import org.apache.commons.beanutils.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.http.HttpStatus;
import org.springframework.stereotype.Service;
import org.springframework.web.client.RestTemplate;

import java.lang.reflect.InvocationTargetException;
import java.util.Map;

@Service
public class OpenFeignOrderServiceImpl implements OrderService {
    @Autowired
    OrderDao orderDao;
    @Autowired
    RestTemplate restTemplate;
    @Autowired
    RemoteProductServe remoteProductServe;
    @Override
    @GlobalTransactional
    public ResponseEntity generateOrder(Integer pid, Integer num) {
        //使用入门的微服务调用方案
//        ResponseEntity productResp = restTemplate.getForObject("http://myh-product/product/" + pid, ResponseEntity.class);
        ResponseEntity productResp = remoteProductServe.findOneByPid(pid);
        //写业务代码
        Product product = new Product();
        //处理如果获取不到数据
        if (Integer.parseInt(productResp.get(ResponseEntity.ResponseStatus.CODE.value())+"")==HttpStatus.INTERNAL_SERVER_ERROR.value()){
            return productResp;
        }
        Map map= (Map) productResp.get(ResponseEntity.ResponseStatus.DATA.value());
        try {
            //想办法把LinkedHashMap转换为Product对象
            BeanUtils.populate(product,map);
        } catch (IllegalAccessException e) {
            e.printStackTrace();
        } catch (InvocationTargetException e) {
            e.printStackTrace();
        }

        Order order = new Order();
        //用户信息假数据
        order.setUid(1);
        order.setUsername("jerry");
        order.setPid(product.getPid());
        order.setPname(product.getName());
        order.setPrice(product.getPrice());
        //存储购买的数量
        order.setNumber(num);
        Order returnOrder = null;
        ResponseEntity response = null;
        //如果订单入库成功，应该扣减库存
        if (product.getStock()-num>=0) {//商品扣减后必须大于等于0才能够扣减商品
            returnOrder = orderDao.save(order);
            product.setStock(product.getStock()-num);
            //return remoteProductServe.updateProduct(product);
            response = remoteProductServe.updateProduct(product);
            return response;
        }else{
            return new ResponseEntity(HttpStatus.NOT_MODIFIED.value(),"商品卖完了。");
        }
    }

}
